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The coefficient of thermal expansion of concrete is very small to that of steel, eliminating large internal stresses due to differences in thermal expansion or contraction.

The coefficient of thermal expansion of concrete is very small to that of steel, eliminating large internal stresses due to differences in thermal expansion or contraction. Correct Answer False

The coefficient of thermal expansion of concrete is similar to that of steel, eliminating large internal stresses due to differences in thermal expansion or contraction.

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The coefficient of thermal expansion of concrete is similar to that of steel, eliminating large internal stresses due to differences in thermal expansion or contraction.
The accompanying image shows a large cube made of dark and white small sugar cubes. Small cubes of the diagonally arranged row of the bottom surface of the large cube, small cubes of the row with one face on the right-hand surface of the large cube, small cubes of the row with one face on the front surface of the large cube, and small cubes of the column with one face on the top of large cube surface are all dark. Select the number of small white cubes of the large cube.
Large, medium and small ships are used to bring water. 4 large ships carry as much water as 7 small ships, 3 medium ships carry the same amount of water as 2 large ships and 1 small ship. 15 large, 7 medium and 14 small ships, each made 36 journeys and brought a certain quantity of water. In how many journeys would 12 large, 14 medium and 21 small ships bring the same quantity ?
Regarding the Indian economy, which of the following reflect, unprecedented suspension of economic activity in the first quarter of this fiscal (April - June) due to the Covid pandemic (a) Contraction of around 50.3% in the construction sector (b) Contraction of around 39.3% in the manufacturing sector (c) Contraction of around 10% in the Agri, forestry and fishing sector (d) Contraction of around 5% in the Trade, hotels, transport sector
Permeability in concrete is studied towards providing for, or guarding against, which of the following features? 1. The penetration by materials in solution may adversely affect the durability of concrete; moreover, aggressive liquids 'attack' the concrete. 2. In the case of reinforced concrete, ingress of moisture and air will result in corrosion of steel leading to an increase in the volume of steel, resulting in cracking and swilling of the concrete cover. 3. The moisture penetration depends on permeability and if the concrete can become saturated with water it is less vulnerable to frost action.
Consider the following statements; 1) In a reinforced concrete member subjected to flexure, the externally applied moment is resisted by an internal couple formed by steel and concrete and their magnitudes vary with the applied moment, while the lever arm of the internal couple remains constant 2) In a prestressed concrete. Member, the external moment is resisted by an internal couple, but it is the lever arm that changes with the loading conditions and the stress in steel remain practically constant Which of the above statements is/are correct?
A bar of bronze and a bar of steel are placed between two immovable supports, A and B as shown in the figure. The physical constant are : (where L = Length of bars, A = cross-sectional area, α = linear coefficient of thermal expansion, E = Young’s modulus) Steel                                      Bronze L = 0.5 m                              L = 0.75 m A = 6 × 10-4m2                    A = 12 × 10-4 m2 α = 12 × 10-6/°C                 α = 20 × 10-6/°C E = 200 GPa                         E = 100 GPa The stresses in the steel and bronze, when temperature drops by 50°C is
A dowel bar is placed at a contraction joint. When contraction occurs, the concrete slab cracks at predetermined location(s). Identify the arrangement, which shows the correct placement of dowel bar and the place of occurrence of the contraction crack(s).
Consider the following statements: 1) workability of concrete increases with the increase in the proportion of water content 2) Concrete having small-sized aggregates is more workable than that containing large-sized aggregate 3) For the same quantity of water, rounded aggregates produce a more workable concrete mix as compared to angular and flaky aggregates 4) A concrete mix with no slump shown in the slump cone test indicates its very poor workability Which of the above statements are correct?
What is the relation between the Coefficient of thermal expansion of concrete and the coefficient of thermal expansion in aggregates?